Question

In fishes, the lateral line receptors are neuromast organs. These acts as
A.Olfactory receptors
B.Gustatory receptors
C.Rheoreceptors
D.Chemoreceptors

Answer 1

Hint:The neuromast organs are a type of mechanoreceptor that is commonly found in aquatic animals such as fishes and helps them to detect the signal strength of water current and then their body responds accordingly.

Complete answer:A lateral line or lateral line system is a type of system of sense organs commonly found in aquatic vertebrates. It is commonly used to detect movement, pressure gradients, and vibration of the surrounding water. Fishes also use this system to detect the vortices that are produced by the fleeing prey. These receptors can detect the objects through echolocation and are a type of rheoreceptors. They are the collection of the sense organs that are distributed over the skin or in the sub-epidermal canals of the head and lower body portion of the fishes. They are commonly found in cyclostomes, larval amphibians, fishes, urodele amphibians, etc. These receptors on the skin are stimulated by water currents. They are also known as flow-sensitive superficial neuromasts. They exhibit variation between different taxonomic groups.
Hence, the correct answer is option C) Rheoreceptors.

Note:Rheoreceptors are known as neuromast or canal organs. They are tactile sense organs that are unique to aquatic vertebrates. They are made up of a series of mechanoreceptors that are arranged in an interconnected network with head and body. They are arranged in rows and remain embedded in the mucus-filled structures known as lateral line canals.